Machine for threading pipes



J. A. REESE.

MACHINE FOR EHREADING PIPES.

APPLICATION FILED APR.26, 1919.

Patented June 8, 1920.

3 SHE ETSSHEET I.

J. A. REESE. MACHXNE FOB THREADING PIPES. APPLICATION FILED APR.26|191-9.

Patented June 8, 1920.

3 SHEETS-SHEET 3- JAMES AFREESE, 0F BLYTHEVILLE, ARKANSAS, ASSIGNOR TOAMERICAN PIPE MACHINE COMPANY, TOM B. LAIBD, TRUSTEE, A TRUST ESTATE.

MACHINE F 33,- THR-EADING PIPES.

, Application filed April 26,

To all whom it may concern:

Be it known that I, JAMES A. REEsE, a citizen of the United States,residing at Blytheville, in the county of Mississippi and State ofArkansas, have invented a new and useful Machine for Threading Fipes, ofwhich the following is a specification.

This invention relates to a portable machine for use in cutting threadson pipes of different kinds, it being adapted to use an ordinary handdie, there being motor driven mechanism for actuating the die either tocut the thread or to unscrew it from the threaded pipe.

A further object is to provide reversible mechanism which is constantlyunder the control of the operator and which acts automatically to stopthe threading operation when the desired number of threads have beencut, and to immediately thereafter autornatically reverse the operationof the die so as to disengage it from the pipe.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, itbeing understood, within the scope of what isclaimed, changes in the precise embodiment of the invention shown can bemade without departing from the spirit of the invention. a

In the accompanying drawings the preferred form of the invention has 7been shown.

In said drawings:

Figure 1 isa plan view ofthe machine, portions of the base being brokenaway.

Fig. 2 is a side elevation, the motor being removed.

Fig. 3 is a section on line 33 Fig. 1.

Fig. 4 is a section on line 4-4 Fig. 1.

Fig. 5 is a section on line 5-5 Fig. 2.

Referring to the figures by characters of reference 1 designates a baseon which are mounted near the sides and adjacent one end, standards 2and 3 each of which is provided with a recess 1 in its upper end andwith an arched cap 5 which is pivotally connected to the standard and isheld in place by a bolt 6 extending into a slot 7 in the cap. A setscrew 7 is mounted in each cap and the two set screws are adapted toclamp upon the oppositely extending arms 8 of a hand die 9 which is ofthe usual well known construction. As shown Specification of LettersPatent.

D Patented June 8, 1920.

Serial No. 292,785.

this hand die is provided with the radially disposed cutters 10, aslidable member 11 having guide pins 12 sliding in the die 9, a pipereceiving tube 18 provided with binding screws li for gripping the pipeP, and a gear 15 upon the tube or sleeve 13 meshing with and adapted tobe driven by a small gear 16 secured to a key 17 which is slida'olymounted in the die 9. This key has an angular head 18 and the mechanismdescribed operates in the usual manner. In other words by rotating thekey 17 the gear 16 will rotate gear 15 and tube or sleeve 13, thuscausing the pipe P to be rotated between the cutters 10 and to bethreaded thereby. As the pipe is threaded it is gradually fed forwardthe key 17 at this time sliding forwardly within the die 9. pin 12alsoslides within the die during the operation as will be obvious. Asbefore stated the construction and operation. of this hand dieconstitute, in itself, no part of the present invention but said die isof a well known type for general use.

Mounted on the base 1 is a motor 19 provided with a gear 20 meshing withand adapted to actuate a larger gear 21. This gear is mounted forrotation on a stud 22 extending from a standard 23 and a small gear 24rotates on said stud with the gear 21 and meshes with a larger gear 25.Gear 25 is secured to a shaft 26 which is journaled in the standard 23and also .in a bearing 2'? and secured to this shaft and between thestandard and bearing is a gear 28 meshim with an idler gear 29 which, inturn, meshes with a gear 30 secured to a longitudinal shaft 31. Anotherlongitudinal shaft 32 is journaled in said standard and bearing and isprovided with. a gear 33 W1 ich laps but does not mesh with the gear 30.A yoke 34 is pivotally mounted between the standard 23 and the bearing27 and carries two gears 35 and 36 arranged side by side and rotatingtogether. The gear 35 is adapted to mesh with the gear 33 while the gear36 is adapted to mesh with. the gear 28. Yoke 3 1- has a handle 37 andis also provided with a dog 38 adapted to engage notches in a holdingmember 39 upstanding from the base. When the dog is in one of thenotches the gears 35 and 36 are held in mesh with the gears 33 and 28respectively. When, however, the yoke 34 is moved downwardly, these twogears 35 and 36 are shifted out of mesh with the gears The 33 and 28. Inthis manner the transmission of motion from the shaft 26 to the shaft 32can be controlled;

Mounted on the base 1 is a standard 40 and the shaft 31 is journaled'therein and has a clutch member 41 feathered on the shaft, this clutchmember being provided with an angular groove 42. A gear 43 is looselymounted on this shaft 31 and is also provided with a clutch member 44.

The shaft 32 has a tubular extension 45 adapted to rotate therewith anda clutch member 46 is provided at one end of this tubular portion. Ashaft section 47 is journaled in the bearing40 and projects at one endinto the tubular extension 45 and is adapted to rotate therein. A gear48 is secured to this shaft section 47 and meshes with the gear 43. Aclutch member 49 is feathered on the shaft section 47 and has an annulargroove 50. This clutch member is adapted to be shifted into or out ofengagement with the clutch member 46, thus to couple the shaft section47 and to uncouple it from the tubular extension and shaft 32.

The shaft section 47 is spaced from but alined with the key 17 of thehand die and feathered on the shaft section 47 is a coupling sleeve 54having angular opening in one end adapted to receive the angular head 18of the key when the sleeve is shifted longitudinally toward the handdie. The parts have been shown coupled together in Fig. 1.

Slidably mounted in the bearing 40 and in the bearing 27 is a rod .55 towhich is secured a collar 56. A spring 57 is mounted on this rod andbears at one end against the collar 56 and atits other end against thebearing 40. To this rod. is secured an arm 58 the upper end of which isforked as shown at 59 and is seated in the groove 42 in the clutchmember 41. Another rod 60 is slidably mounted in the bearings 40 and 27and has a spring 61 thereon hearing at one end againstthe bearing 40 andat its other end against a collar 62 on the rod. o this rod is securedan arm 63 provided at its upper end with a fork 64 which is seated inthe groove 56 in clutch member 49. A finger 65 extends laterally fromthe arm 63 and laps the arm 58.

Abraeket 66 is located below the arms 58 and 63 and slidably mounted inthis bracket is a yieldin 'ly supported latch bolt 67 adapted, when innormal position, to have its upper end in the path of or in engage mentwith the lower end of the arm 63, said upper end. of the bolt beingbeveled as shown. A bell crank l ver 68 is tiltably mounted on thebracket and one arm of this lever engages the bolt 67 while the otherarm thereof is connected to a rod 69 pivoted to and supported by a link70. A finger 71 is secured to the rod 69 and projects into the path ofone of the pins 12 of the hand die; A- rod 72 is slidably mounted inthebracket 66 and has a finger 73 projecting therefrom and adapted tothrust against the lower arm of the arm 58. The rod 72 is connected atone end to a lever 74 and the other end of this lever is connected to arod 7 5 which is extended across one side of the hand die and through a'guide-gear 76 extending from the bearing2. A finger 7'7 is provided onthis rod 75 and projectsinto the path of the slidable member of the handdie as shown particularly in Fig. 1. An operating lever 78 is pivotallymountedonthe bearing standard 2 and is connected to the rod 60.

his to be understood that, under normal conditions the arm 63 isdisengaged from the latch bolt 67 and the springs 57 and 61 hold thearms 58 and 63 shifted toward the hand die with the result that theclutch members 41 and 44 are thus in engagement with each other whilethe clutch members 46 and 49 are out of engagement. After the hand diehas been adjusted intoposition and the end of a pipe .1 has been securedin the hand die by the clamping screws 14, the sleeve 54 is shiftedlongitudinally into engagement with the head 18 of the key of the handdie. When the motor 19 is started motion will be transmitted therefromthrough the gears to the shafts 32 and 31 but as shaft 32 is normallyuncoupled from shaft 47 and the pressure of the hand die against thefinger 77 transmitted through lever 74 and rod 55 holds theclutch member7 41 normally disengaged from clutch member 44, it will be obvious thatduring the operation of the motor the two gears 43 and 48 will'not beactuated. By shifting lever 78 the rod 60 will thrust arm 63 along shaft47 so as to cause the clutch member 49 to engage clutch member 45 andthus couple the shaft section 47 to the shaft 32. the same time finger65 will move against the arm 58 and holdthe clutch member 41 out ofengagement with the clutch member 44. The parts will be held in thesepositions by the latch bolt 67 over which the arm. 63 will snap whenpushed to the position men tioned. As soon as the parts have thus beenshifted motion will be transmitted through the drivingmechanism to theshaft section 47 and key head 18 will be caused to rotate, thus feedingthe pipe P into the die and causing it to be threaded. After a.predetermined number of threads have been cut on this pipe, one of thepins 12 will come against the finger 71 and thrust the rod 69longitudinally so as to operate the bell crank lever 68 and depress thelatch bolt 67. As soon as the bolt is thus depressed the spring 61 willshift the rod 60 back to its' normal position, pulling with it the arm63 so as to uncouple the clutch members '49 and d6. At the same time arm58 will be released and its actuating spring 57- will shift the rod 55longitudinally and thereby throw the clutch member 41 into engagementwith the clutch member 44. As a result motion will thus be transmittedthrough the gearing and shaft 31 to gears 43 and d8 with the result thatthe shaft section ll which is uncoupled from shaft 32 will be rotated inthe opposite direction and cause the key 17 to actuate the mechanism ofthe hand die and unscrew the threaded pipe from the cutters. As soon asthe movable members of the hand die have been shifted outwardly asufiicient distance to completely withdraw the threaded pipe from thecutters, said movable motion will come against the finger 77 and shiftthe rod 75 longitudinally. This will cause the lever 74 to thrustthrough rod 72 and cause the finger 73 to push against the lower end ofarm 58 with the result that the clutch member ll will be uncoupled fromthe clutch member lei and the parts of the machine thus reset. At anytime during the threading operation the rotation of the key 17 can bestopped by shifting the yoke 3d so as to move the gear out of mesh withgear What is claimed is:

1. In a threading machine the combination with a die having a keyoperated movable member, and means for supporting the die in operativeposition of driving mechanism, separate shafts combined therewith,

'rneans upon one of the shafts for engaging and actuating the key, whenthe shaft is driven in one direction, for feeding a pipe into thethreading die, cooperating means upon the two shafts for reversing themovement of the key, and means controlled by the feeding of the pipeduring the threading operation for uncoupling the direct connectionbetween the key operating shaft and its driving mechanism and forcoupling said shaft to its reversing mechanism, and means operated bythe movable portions of the die upon the completion of the unscrewing ofthe pipe from the cutters for automatically uncoupling the reversingmechanism.

2. In a pipe threading machine the combination with a threading diehaving a key and a movable pipe engaging and rotating member, of drivingmechanism including separate shafts, means upon one of the shafts forengaging the key of the die to actuate the movable portion thereof,means for coupling the shaft directly to the driving mechanism forrotating the key and feeding the pipe to thread the pipe, means operatedby the feeding of the pipe and upon the completion of the threadingoperation for automatically uncoupling said shaft from its drivingmechanism and for coupling the other shaft thereto to reverse the actionof the key and to unscrew the threaded pipe from the die, and meansoperated by the movable portions of the die upon the completion of theunscrewing operation for automatically uncoupling the reversingmechanism from the driving mechanism and resetting the apparatus.

3. The combination with a pipe threading die including a key operatedmovable member, of driving mechanism, an operating shaft, a reversingshaft, gears connecting the shafts, means under the control of theoperator for coupling the operating shaft to the driving mechanism,means for coupling said shaft to the key of the die, means operated bythe movable member of the die during the actuation of the operatingshaft for automatically uncoupling said shaft from its driving mechanismand couplingthe gears to the driving mechanism through the reversingshaft and means operated by the unscrewing of the threaded pipe in thedie for uncoupling said gears from the reversing shaft and resetting themechanism.

4. The combination with a pipe threading die including a key operatedmovable member, of driving mechanism, an operating shaft, means forcoupling it to the key, a reversing shaft, gears connecting the shafts,means under the control of the operator for coupling the operating shaftto the driving mechanism, supplemental means under the control of theoperator for uncoupling and coupling said operating shaft, from and tothe driving mechanism, means operated by the movable member of the dieduring the actuation of said operating shaft for automaticallyuncoupling said shaft from its driving mechanism and coupling the gearsto the driving mechanism through the reversing shaft, and means operatedby the unscrewing of the threaded pipe from the die for uncoupling saidgears from the reversing shaft and resetting the mechanism.

5. The combination with a pipe threading die including a key operatedmovable member, of driving mechanism, an operat ing shaft, means forcoupling it to the key, a reversing shaft, meshing gears, one of saidgears being fixed upon the operating shaft and the other gear loose uponthe reversing shaft, means under the control. of the op eratorfor'coupling the operating shaft to the driving mechanism, means forautomatically locking said coupling means when the shaft is coupled tothe driving mecha nism, means operated by the coupling of the operatingshaft to its driving mechanism for holding the reversing shaft uncoupledfrom its gear, means operated by the movable member of the die duringthe threading of the pipe for automatically unlocking the coupling meansof the operating shaft, separate means for automatically uncoupling Intestimony that I claim the foregoing as my own I have hereto aflixed mysigna- 10 ture in the presence of two Witnesses.

V JAMES A. REESE. Witnesses SAM COsTEN, C. E. CRIGGER.

